the benefit of the change? - business approval
the method of doing it? - technical approval
the scheduling? - everyone impacted either by the change or by its implementation
the costs? the bean counters
the resourcing? - managers of resources

And then the Change Manager approves that all these aspects are covered properly before giving the go-ahead._________________"Method goes far to prevent trouble in business: for it makes the task easy, hinders confusion, saves abundance of time, and instructs those that have business depending, both what to do and what to hope."
William Penn 1644-1718